1 any of various porpoise-like sea mammals of the family Delphinidae having a slender beaklike snout.
2 (in general use) = DORADO 1.
3 a bollard, pile, or buoy for mooring.
4 a structure for protecting the pier of a bridge.
5 a curved fish in heraldry, sculpture, etc.
Etymology: ME, also delphin f. L delphinus f. Gk delphis -inos
Useful english dictionary. 2012.